Delete duplicate line

Author: gjbex

source-code/gpu/pycuda.ipynb

@@ -684,7 +684,6 @@
     "kernel_mandelbrot = ElementwiseKernel('pycuda::complex<float> *z, pycuda::complex<float> c, int *graph, int max_iters',\n",
     "                                      '''\n",
     "                                      graph[i] = 0;\n",
-    "                                      graph[i] = 0;\n",
     "                                      while (graph[i] < max_iters && abs(z[i]) < 2.0) {\n",
     "                                          z[i] = z[i]*z[i] + c;\n",
     "                                          graph[i]++;\n",